Potato Puff Casserole Recipe

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You'd never guess that leftover mashed potatoes are the main ingredient in this delightful casserole. "I've served this elegant side dish to company," writes Sharon Skildum of Maple Grove, Minnesota. "It's so moist and light it always brings compliments."
TOTAL TIME: Prep: 25 min. Bake: 40 min.
MAKES:6 servings
TOTAL TIME: Prep: 25 min. Bake: 40 min.
MAKES: 6 servings


  • 1 small onion, chopped
  • 2 tablespoons butter
  • 1/2 cup milk
  • 1/2 teaspoon ground mustard
  • 1/4 teaspoon salt
  • 1/8 teaspoon pepper
  • 2 cups mashed potatoes (with added milk and butter)
  • 2 eggs, separated
  • 1 cup (4 ounces) shredded cheddar cheese, optional

Nutritional Facts

3/4 cup: 217 calories, 15g fat (9g saturated fat), 112mg cholesterol, 488mg sodium, 15g carbohydrate (3g sugars, 2g fiber), 8g protein.


  1. In a large skillet, saute onion in butter until tender. Stir in the milk, mustard, salt and pepper; bring to a boil. Remove from the heat; stir in potatoes. Stir in egg yolks until blended. Cool at room temperature for 15 minutes. Stir in the cheese if desired.
  2. In a small bowl, beat egg whites until soft peaks form. Fold into potato mixture. Spoon into a greased 1-qt. baking dish.
  3. Bake at 350° for 40-45 minutes or until puffed and lightly browned. Yield: 6 servings.
Originally published as Potato Puff Casserole in Quick Cooking November/December 1998, p35

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Sally Wisdom User ID: 706350 31018
Reviewed May. 30, 2008

"This sounds like a wonderful recipe to take to a potluck luncheon/dinner. I'll try it next month when I go to the potluck luncheon group to which I belong!"

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